-Add problems
-https://www.janko.at/Retros/Glossary/Dynamo.htm
-https://www.janko.at/Retros/Problemkiste/N1995-04.htm#3718
+"FreeBoard", re-using a lot of Board logic, but with SVG (empty) board + SVG (empty) reserves.
+Will be used for variants with custom non-rectangular board (Hex, at least)
+Or, with other board shapes (see greenchess.net for example)